Validation of Particle Size Segregation of Sintered Ore during Flowing through Laboratory-scale Chute by Discrete Element Method

• Published in: ISIJ International 2008/12/15, Vol.48(12), pp.1696-1703
• Main Authors: Mio, Hiroshi, Komatsuki, Satoshi, Akashi, Masatoshi, Shimosaka, Atsuko, Shirakawa, Yoshiyuki, Hidaka, Jusuke, Kadowaki, Masatomo, Matsuzaki, Shinroku, Kunitomo, Kazuya
• Format: Article
• Language: English
• Subjects: Applied sciences; blast furnace; chute flow; Discrete Element Method; Exact sciences and technology; ironmaking process; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; particle size segregation; Powder metallurgy. Composite materials; Production techniques; rolling friction; Sintered metals and alloys. Pseudo alloys. Cermets
• ISSN: 0915-1559; 1347-5460
• DOI: 10.2355/isijinternational.48.1696

In this paper, the particle size segregation of sintered ore during flowing through a laboratory-scale chute was investigated to validate the simulated results. The chute angle, installation of a damper at the outlet of the chute or the particle mixing condition were changed. The particles were segregated during flowing through the chute. The smaller particles were at the bottom wall of the chute, and the larger ones were on the smaller particles. The particle discharging velocity decreased with increasing the rolling friction in DEM, and the velocity also became uniformly. The particle discharging behavior under the large rolling friction was not spread, this phenomenon was not comparable with the experimental one. The distributed coefficient of rolling friction was determined by the distribution of rolled distance of sintered ore particle, and every particle in DEM had the different value according to the distribution of rolled distance. This method was effective for the sintered ores' flow very much, and the simulated particle size segregation agreed with those of experimental very well, irrespective of chute angle, installation of a damper or particle conditions. Therefore, this simulation has been validated for the analysis of the granular flow in an ironmaking process.